X-ray apparatus



y 29, 1952 F. ZABRANSKY 2,605,458

X-RAY APPARATUS Filed Feb. 26, 1948 Jarentor Franz Za 6/1 0 Agent Patented Jul 29, 1952 2,605,458 mm APPARATUS. 9 Franz Zabransky, Vienna-, Austria I ApplicationFebruary '26, 1948,".Serial No. .'11-, 11 1I v In-hustr'ia December 7;,1945', i

Section 1, Pub lic Law 690, August 1946 i i? Patent expires December 7, 1965 l i 9 Claims.

My'invention relates to X-ray apparatus. X-ray technics are known to be set the task of; making use ofthe highest admissible effect of theX-ray tube, which results in the most favourable conditions for operating from a therapeutical and diagnostical point of view. According to. the present state of development of technics this aim could be only attained if a transformer adjusted for full effect at each secondary voltage was used, which means a heavy weight of the'high-voltage transformer due to its then necessary large dimensions. A unit constructed of the X-ray tube and the high-voltage transformer'offers substantial advantages of construction (suchas higher reliability of operation, better cooling of the Xi-raytube, omission of 'the safety-high-voltage feeding-cables of large diameter), yet the weight of this X-ray unit. is limited, the more so as for .clinical use easy adjustmentin any position is required.

It is an'object of my invention to provide such an-X-ray apparatus that the aforesaid. movable unitin relation to a certain weight yields a higher effect than could be attained hitherto.

It is a further object of my invention to provide such an X-ray apparatus that the effect of,

the X-ray tube can be made full use of, and that the transformer combinedwith it always works with highest efficiency.

Still another object of my invention is to separation from the movable unit, which transformer is adapted to be adjusted for delivering various voltages to the X-ray tube. This offers a possibility of controlling the anode-voltageof the tube, while a comparatively small, movable unit, that operates with high economy andis well adapted to the requirements of medical practice, is retained.

Furthermore it is an object of my invention to provide an X-ray apparatus the tube of which is fed by way of a high-tension cable by a highvoltage transformer locally separated from it, whereat it is possible to operate the transformer always with highest efficiency which implies economic and technical advantages.

These and other objects will more clearly appear from the following detailed description of a preferred embodiment. illustrated in the drawing which shows in a diagrammatical way the circuit according to which the invented apparatus operates.

In the drawing A denotes the X-ray unit connected with the control-board B. The X-ray unit A consists of the tube I, the filament transtarns'former, which is applied to the 'X-ray tube 15; I. The adjustable transformer. 6,1, 8 produces; an additional voltage of 'variable value/andpositive or negative polarity according to 1 th'e, position of switch 9'- This additi'onalvoltage; is connected to the basic. voltage produced in -the- 23), windings 4,5 and will either'raise or reduce this basic voltage, whereby the operating voltage-{of the tube. I can be altered according to'requirej ment.

.33 application of the idea of.. -m'

there is made full use of the effect of the X-ray, unit A. The transformer Aproduces theI con-; stant. basic, voltage for the. v tube I so that this, transformer always operates with the. effect, for which it. was. laid. out, That -isv whyit. works.

with highest efficiency.., 1i'or control of theanodeprovide for an. auxiliary transformer in local voltage at the, tube: I. draw additional voltage. from. the adjustable transformer; which-addi.-. tional voltageisconducted by way of. thetcables l2 and [3 to the secondary windings of thetrans former of .unit A. In that manner the ,emciency of the X-ray unit A is raised without increasing. its weight. .The idea of myinvention renders. the generally used primary-control (reducing or the primary voltage orv additional connecting of" primary windings) superfluous-and with it the larger dimensions; of the transformer involved in it. Besides reducing'theweight ot'the X-ray unit, this means also saving "of raw-material; fasj the controlling devices only need dimensions for weak secondary'current. u

In the embodiment shown b wa or example:

both the feeding cables 12' and" l3i'are to"be*'la'id out for half the controlling voltage. wires connecting-"A and B" can be placed there;

comprising a high voltage transformer for pro- V I ducing a basic plate voltage and an auxiliary transformer for producing a regulating voltage to vary the plate voltage, said auxiliary trans- ,former being connected in series with the sec-' ondary side of said high voltage transformer so that the voltage supplied by said auxiliary transformeris added vectorially to the voltage supplied by said high voltage transformer.

2. In an X-ray apparatus a voltage'source for supplying the plate voltage of the X-ray tube, comprising a high voltage transformer for producing an invariable basic plate voltage and an auxiliary transformer r015 producing a regulatingv'oltag'e' -to, vary'the plate voltage, said auxiliary transformer being connected in series with s the secondary side of said high voltage transformer so 1 that the voltage supplied by said auxiliary transformer is added vectorially to the invariable voltage suppliedjbysaid high voltage transformenfj j r p 3.; In anx- -rayj apparatus avoltage source for supplying the plate voltage of the X-ray tube;

comprisinga high'fvoltage transformer having; a secondary, winding divided into two parts for'pro- .duciega basicjplategvoltage and an auxiliary transformer for, producing a regulating voltage tofvary'the platevo1tage, said auxiliar transformer being connected with. the separating points of said. two parts of said secondary windingof ,said'high voltage transformer and thereby in series with 'saidsec'ondary winding of said high voltageitransformer; so that the voltage supplied by' said auxiliary transformer is added vectorially to the-voltage supplied by said high voltage transfirm r f 4: "In'- an X-ray'apparatus avoltage sourcefor pplying thefplate voltage of the'X-ray tube,

comprisin a high voltage transformer, for pro-J ducinga basicplate-voltage and a variable transformerflfor producing ,a regulatingjvoltagetd vary the plate voltage, said variable transformer being connectedin serieswith the secondaryside of said high voltage transformerso that the voltage supplied by said. variable transformer is addedivectoriallyto the voltage supplied'by said high-yolta'ge transformer.

5. In anX-rayapparatus a voltage source for supplying the plate voltageof the X-ray tube,

comprisinga high voltage transformer for producing a basic plate; voltage and locally separate fromsaid high voltage transformer an auxiliary transformer forjpro'ducing a regulating voltage t'ovary the plate voltage, said auxiliary tr'ans formerbeing connected in series with the secondary side of. said high voltage transformer so from said high voltage transformer a variable transformer for producing a regulating voltage to vary the plate voltage, said variable transformer being connected in series with the secondary side of said high voltage transformer so that the voltage supplied by said variable transformer is added vectorially to the voltage supplied by said high voltage transformer.

\7. In an X-ray apparatus a voltage source for supplying the plate voltage of the X-ray tube, comprising a high voltage transformer for producing a basic. plate voltage and an auxiliary transformer for producing a regulating voltage 'to vary the plate voltage, said auxiliary transsecondary side of said high voltage transformer.

8. In an X-ray apparatus a voltage source for supplying the plate voltage of the X-ray tube, comprising a high voltage transformer having a secondary'winding divided lint'o two parts for producing a basic plate voltage'jand an'auxiliary transformer for producing a regulating voltage to 'vary the plate voltagejsaidauxiliary transformer beingregulatable at itssecon'dary side, the latter being connected with the separating if points of said two parts of said secondary winding of said high voltage'transformer and thereby in series with said secondary winding of said" high voltage transformer so that the voltagesupplied by said auxiliary transformer is added vectorially to the voltage supplied by said high voltage transformer. r l 0 9. In an X-ray apparatus -a'voltage source for supplying the plate voltage of the X-ray tube, comprising a high voltage transformer-fo1"pro-' ducing a basic plate voltage, and locally separate from said high voltage transformer ahauxiliary; transformer for producing a regulating voltage to vary the plate voltage; said auxiliary/trans former being 'regulatableflatdts secondary'side,

the latter" being connected in series with the The following references are of record in the fileof this 'patentz' UNITED sTA'rEsPArENTs v V 1 Date Number Name 1,620,619 Currier Mar. 8,. 1927 1,926,902 Kelley Sept. 12, 1933 1,945,751 Morrison Feb. 6, 1934 1,973,415 Mutscheller Sept; 11, 1934 2,098,275 Cassen Nov. 9, 1937 2,319,378 Weisglass -May 18, 1943v FOREIGN PATENTS Number Country I I Date 515,055 Great Britain, ,Nov. 24, 1939 OTHER REFERENCES Standard Handbook forElectrical Engineers by A. E. Knowlton, 194ljpages 581 and 582, published by McGraW-Hill Book' Co. I 

